Re: Acer palmatum 'Shirazz' The trees I was observing also experienced this upper burning with a lot of sun in nursery conditions (But almost every JM does at our nursery, even under 30 percent shade cloth). On a side note, these trees showed some very vigorous growth through the summer that did not burn much if any. Some shoots were 3 feet long. Blamb your tree should adapt a little as it get rooted in and when we get some descent rain (irrigation helps but it just isn't the same IMO), but I think you will see some burn in full sun regardless of age. If I had a spot, I'd move it to get morning sun and afternoon shade. That should bring out enough color without much burning.